package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.OrdersPaymentDTO;
import com.sky.dto.OrdersSubmitDTO;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * @author yangLiHua
 * @version 1.0
 * @DATE 2023-11-23 20:24:12
 */
@Service
@Slf4j
public class OrderServiceImpl implements OrderService {

    @Autowired
    private AddressBookMapper addressBookMapper;

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private OrderDetailMapper orderDetailMapper;

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WeChatPayUtil weChatPayUtil;

    @Autowired
    private WebSocketServer webSocketServer;

    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        // 出现的异常情况(地址没有填写)
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if(addressBook == null){
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        // 查询当前用户的购物数据
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);

        // 获取购物车列表
        List<ShoppingCart> shoppingCartslist = shoppingCartMapper.list(shoppingCart);
        if(shoppingCartslist == null || shoppingCartslist.size() == 0){
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        // 订单数据
        Orders order = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,order);
        order.setNumber(String.valueOf(System.currentTimeMillis()));
        order.setStatus(Orders.PENDING_PAYMENT);
        order.setUserId(userId);
        order.setAddress(addressBook.getDetail());
        order.setOrderTime(LocalDateTime.now());
        order.setPayStatus(Orders.UN_PAID);
        order.setConsignee(addressBook.getConsignee());
        order.setPhone(addressBook.getPhone());

        // 想订单表中新增一条数据
        orderMapper.insert(order);

        // 订单明细
        List<OrderDetail> orderDetails = new ArrayList<>();
        //详细内容
        for (ShoppingCart cart : shoppingCartslist) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart,orderDetail);
            orderDetail.setOrderId(order.getId());
            orderDetails.add(orderDetail);
        }

        // 向订单明细表中添加n条数据
        orderDetailMapper.insertBatch(orderDetails);

        // 清空购物车
        shoppingCartMapper.deleteByUserId(userId);

        // 封装返回的数据
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(order.getId())
                .orderNumber(order.getNumber())
                .orderAmount(order.getAmount())
                .orderTime(order.getOrderTime())
                .build();

        return orderSubmitVO;
    }

    /**
     * 订单支付
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception{

        // 当前登录用户的id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        // 调用微信支付接口，生成预支付订单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), // 用户订单号
//                new BigDecimal(0.01), // 支付金额
//                "苍穹外卖订单", // 商品描述
//                user.getOpenid() // 微信用户的openid
//        );

        JSONObject jsonObject = new JSONObject();


        if(jsonObject.getString("code") != null &&
                jsonObject.getString("code").equals("ORDERPAID")){
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));
        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单号查询当前用户的订单
        Orders ordersDB = orderMapper.getByNumberAndUserId(outTradeNo, userId);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        Map map = new HashMap();
        map.put("type",1); // 消息类型，1表示来单提醒
        map.put("orderId",orders.getId());
        map.put("content","订单号"+outTradeNo);

        //通过WebSocket实现来单提醒，向客户端浏览器推送消息
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }

    /**
     * 用户催单
     * @param id
     * @return
     */
    public void reminder(Long id) {
        Orders orders = orderMapper.getById(id);
        if(orders == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        // 基于websocket进行催单
        Map map = new HashMap();
        map.put("type",2); // 2表示用户催单
        map.put("orderId",id);
        map.put("content","订单号："+orders.getNumber());
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }
}
